The silver-gray L-15C falcon dragged its slender and sharp majesty, like an eagle, showing its sharp momentum, and headed towards the higher sky.

Five thousand meters!

Seven thousand meters!

Ten thousand meters!

After passing through the thin high-altitude cumulus clouds, two long and undissipated tail clouds hung at the tail of the machine, and the entire war eagle climbed to a height of ten thousand meters that was always blue.

The air here is thin, and only a few people in the world are qualified to enjoy the beautiful scenery that will never be tired of.

With the continuous growth of height, the air becomes thinner, and the power output from the two WS-17 turbofan engines gradually decreases. The flexible and lightweight L-15C Falcon gradually looks like a slow snail, with a linear decline in maneuverability and climbing efficiency.

Ten thousand two thousand meters.

Ten thousand three thousand meters.

After more than ten seconds, the clumsy and slow L-15C Falcon climbed to a predetermined height, and the front pressure of the nose changed its own angle of attack and smoothly changed its flight.

"Now, put the lever, according to the falling posture, the tail rotation is generally divided into three types: the tail facing down, the fuselage is horizontal, and the head facing down. Among them, the head and tail rotation are the easiest to change, and the tail rotation of the fuselage is the second most difficult to change. The level needs to be changed to the head and tail rotation, and the tail facing down, the tail turning down is the most dangerous and difficult to control."

After climbing to the predetermined height, Yang Xiaolong took over the control of the fuselage and carefully explained to Zhou Hai the situation about the tail rotation through the radio communicator: "The reason why the aircraft has different tail rotation postures is related to the movements and center of gravity distribution before stalling. Stalling does not necessarily have tail rotation, but tail rotation must be in a stall state."

"Um."

Zhou Hai listened quietly and Yang Xiaolong's explanation included both well-known aviation theory knowledge and precious personal flight experience.

Stall tail spin modification - this training subject full of extremely high risk must be treated with caution, and Zhou Hai will not take it lightly.

"Zhou Hai, the most important thing in dealing with stall tail spin is to be calm and calm! After the plane enters the stall tail spin state, you must not be in a hurry and avoid blind operation."

Yang Xiaolong held the joystick smoothly and maintained a horizontal posture in the fuselage. He emphasized: "Last year, when a Shanying Higher Education Higher Education trained to change the tail spin at high altitude stall, the students were too nervous and panicked, causing the head to turn down to the tail to turn down. He encountered the influence of high altitude turbulence, and finally it could not be modified. He could only eject the skydiving, wasting a precious fighter jet and resources of the country."

"Where are the students and teachers?" Zhou Hai's heart sank when he heard these words and asked softly.

"There is no big deal for two people to be safe. The most important thing is to deal with tail rotation. At a height of 14,000 meters, we have about 140 seconds. In the head and tail rotation state, we must return the throttle to zero, let the engine be in a slow state, press the lever forward, and maintain the dive control lever position."

Yang Xiaolong's voice was steady and powerful, and he slowly explained the relevant steps and contents of handling tail rotation: "At this time, quickly judge the direction of the tail rotation. Assuming to the right, we need to step on the left rudder with the opposite rotation direction, and then slow down or eliminate the rotation. At this time, the aircraft's posture is stable, the aerodynamic rudder surface recovers its effect, and accelerates smoothly downward, so that we can change the flight. Do you remember?"

"Remember."

After listening to Yang Xiaolong's careful explanation, Zhou Hai had a basic concept of the operation steps and process of modifying the stall tail spin. He took a deep breath and responded.

complex!

It's really complicated!

The high-altitude stall tail spin is modified, which is worthy of being the most difficult flight subject to learn in the advanced education stage.

When the aircraft enters the stall tail rotation, it changes from a normal flight attitude to an unstable spin state and rotates around the vertical axis. Due to the separation of air in disordered turbulence and there is no fixed control pattern, all aerodynamic control surfaces are invalid and cannot exert their own effectiveness.

Just the easiest way to modify the head-down tail rotation is required to change a series of complex and fast operations and reactions, not to mention the two tail rotations of the body level and tail-down tail rotations.

"Remember, you must never panic, and you must not make any mistakes in determining the direction of the tail rotation. The two higher difficulty tail rotations, horizontal and downward, need to be converted into a head-down position."

Yang Xiaolong's voice was steady and he said slowly: "The core idea of ​​dealing with tail spin - do it in reverse, use height to change speed and restore control. Next, I will show you the modification of the head and tail spin."

After the words, pull the rod with your right hand to steer, unblock the limit of the airborne avionics to attack angle and operate.

The L-15C Falcon, which is flying at a height of 14,000 meters, quickly reduced its speed from 800 kilometers per hour to 350 kilometers per hour. Then the slender and round nose quickly raised up and the fuselage is in a horizontal left-sided position.

"drop!"

In an instant, a rapid alarm sounded in the water drop-shaped glass cockpit, and the monitor on the left flashed a dazzling yellow picture, giving the fuselage a prompt that the angle of attack was about to exceed.

Yang Xiaolong was calm and calm, continuing to pull the rod backward, step on the rudder with his left foot. After less than a second, the left wing on the fuselage exceeded the maximum angle of attack limit, the edge strip of the wing tip entered a stall state, the airflow separation was in a disordered state, and the two aerodynamic rudder surfaces of the left flap aileron system failed.

"drop!"

The monitor on the left flashes red, the alarm sound in the cabin is extremely rapid, at the highest frequency, and the flight parameters show a stall prompt.

The left wing stalls, the fuselage is horizontally tilted to the left, the fuselage loses balance in an instant, the right wing and aileron system fails in the horizontal rudder, and the head tilts downward to the left and rotates around the vertical axis.

In the cockpit, the scenery around it was dizzying, and the picture was as dazzling as a kaleidoscope. The alarm sounded constantly. The real airspeed of the fuselage dropped rapidly like an open sluice gate, and the drop height was 102 meters per second.

Stall!

Rotate!

This is the nightmare of every student of the higher education aircraft that scared countless people in the aviation field.

"High-speed rotation and overloading cause great psychological pressure on people, and it is indeed difficult."

Zhou Hai, who sat steadily on the ejection seat, did not show any signs. His face was as old as before, calm and calm. His eyes were observing the outside world through the cockpit glass, and then looked at the flight parameters and issued an evaluation.

The speed is as slow as 55 kilometers, with an average drop height of 100 meters. The cabin is spinning and the flight overload is always acting on the body, making it difficult to judge and adapt.

At this time, Yang Xiaolong, who did not dare to delay or hesitate, closed the hydraulic rod as fast as possible, filled the rudder with his right foot, followed the correct steps, and kept the head of the machine accelerated and dived downward.

Although the important aerodynamic surfaces of the wings, flap ailerons and rudders fail, as long as the downward dive is accelerated, the altitude is exchanged for speed, and the correct direction and angle of attack is maintained, the wings can eventually restore the pressure difference, provide lift, and then change the flight state of the stall tail rotor.

One second,

Two seconds,
Chapter completed!